Johann carl grabner and henri ruperti



(No Model.)

J. C.` GRBNER 8p H. RUPBRTI.

STEAMk AGTUATED VALVE.

No. 434,335. Patented Aug. 12, 1890.

zu eizrs gaf/Leases:

UNITED STATES PATENT OFFICE.

JOHANN CARL GEAENEE STEAM-ACTUATED VALVE.

SPECIFICATION forming part 0f Letters Patent N0. 434,335, dated August 12, 1890. Application iiled February 2lI 1889l Serial No. 300,790. (No model.)

To au whom it may concern:

Be it known that we, JOHANN CARL GRAB- NER, a subject of the King of Bavaria, and HENRI RUPERTI, a subject of the Grand Duke of Mecklenburg, residing both at Kupferhammer, near Brackwede, NVestphalia, Prussia, Germany, have invented new and useful Improvements in Steam-Actuated Valves, of which the following is a specification.

This invention relates to cylinder-and-piston motor-engines, and its object is to dispense with the devices heretofore employed for distributing the motor-huid, and to effect the distribution of the motor-duid directly from the source of supply alternately to the ends of the cylinder and piston.

The invention consists in the novel construction, arrangement, and combination of parts, al1 as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, wherein similar letters of reference indicate corresponding parts in all the views.

Figure 1 is a vertical longitudinal section through the cylinder of the engine and the distributing device, taken on the line C D in Fig. 3. Fig. 2 is a horizontal section through the cylinder of the engine, taken on the line A B in Fig. 1; and Fig. 3 is a vertical transverse section through the cylinder of the engine and the distributing device, taken on the line C D in Fig. 1.

The piston B in theVengine-cylinder A is hollow and in continuous communication through an opening h, formed in the bottom Wall of the cylinder, with the steam-inlet pipe c, s0 that there is always a full pressure of steam in the piston. The hollow space of the'piston thus serves in substitution of the slide-box usually employed and arranged beside the engine-cylinder. A piston-slide h,

' having annular portions h and h, is fitted in a second cylinder mounted upon the cylinder A, and the space of said slide-cylinder communicates with the ends of the enginecylinder through live-steam ports formed in the walls of the slide-cylinder and registering with live-steam ports t' t" and m m', formed in the walls of said en gine-cylinder. An exhaustport f, formed in the side walls of the enginecylinder, at one end thereof, leads to an eX- haust-port f, formed in the walls of the slide-cylinder, and asimilar exhaust-port f at the other end of the engine-cylinder, which is covered lby the piston in Fig. 1, leads to another exhaust-port f in the wall AND HENRI RUPERTI, OF KUPFERHAMMER, *NEAR BRACKVEDE, GERMANY.

of the slide-cylinder, both said exhaust-ports v leading to an exhaust-pipe g, formed in the cylinder of the piston-slide. In the position of the piston and the piston-slide shown in Fig. l of the drawings the portsfand f and the space in front of the piston are-connected with the exhaust-pipe g. When the piston and piston-slide are in a position opposite to that shown in Fig. 1, the other port f, the port f', and the space behind the piston are in connection with said exhaust-pipe. Assuming the piston B to be at the end of its stroke to the left, as shown inFigs. 1 and 2, the steam arriving from the hollow space of4 the piston and the port i, acting on the annular part h of the piston-slide, drives the slide to the right, so that the port 'm is opened toward the slide, while the port m is closed toward said slide, as shown in Fig. 1. lIn this position of the slide the exhaust-port f', which is in communication with the space behind,

the piston, is closed toward the exhaust-pipe g, and the exhaustport f, which is in communication with the space in front of the piston, is opened toward the exhaust-pipe g, and the live steam flows from the hollow piston behind the same and acts thereon to move it to the right. As the piston moves to the right, steam flows through a recess 0, formed in the Walls of its cylinder behind the piston, until the edge 2 of the piston covers the edge 11 of the port m, for as the edge 2 of the piston passes over the edge 1 of the port t' steam flows from the piston through the port m, and thence through thecylinder, the piston-slide, and the port t' behind the piston. l.

As above stated, the iiow of steam from the piston behind the same is interruped when the edge 2 of the piston has passed over the edge 11 of the port m as the piston moves from the left to the right. The steam in front of the piston passes through the ports f and f to the exhaustpipe g until the front edge 5 of the piston, as the latter moves to the right, passes over the port f-that is to say,

IOO

has closed said portand after said port has been thus closed the compression of the steam in front of the piston will commence. W'hen the piston has arrived at the end of its stroke to the right-that is to say, when the edge 2 of the piston has passed over the edge 1 of the port #JL-the steam flowing from the piston will flow through the port t and act on the annular part h of the piston-slide and move said slide to the left-that is to say, in the direction opposite to that shown in Fig. l. By this movement of the piston-slide the port m is opened toward the slide, and the steam will flow from the piston in front of the same in the other recess o and act t0 move the piston to the left until the edge 2 of the piston has passed over the edge l1 of the port m. The steam then ilows through the cylinder ot' the piston-slide and the port t behind the piston, and flows thence through the port f', which is opened when the piston-slide reaches the end of its stroke to the left, and escapes through the exhaustpipe g. These movements ot' the piston and piston-slide are repeated at both ends of the engine-cylinder alternately by the alternate flow of the steam through the ports 1l nt and t" m. The ends of the piston-slide 7L carry rods c and c', which in turn carry buffer-pistons d and d', borne upon by coiled springs on said rods and adapted to move in aircylinders e and e surrounding the pistons. The purpose of said buierpistons is to lessen the shock of the pistonslide as the latter is suddenly moved by the steam from the left to the right, or Vice versa, so that the slide will not strike with its ends against the cov ers and 7c of the cylinder. It will be understood that the herein-described distributing device may be applied as well to single as to double acting engines,

passages o near its ends, the exhaust-ports f 5o in its side walls, and the live-steam ports v, t and m m in its upper wall, of the piston B, fitted in said cylinder, having a hollow space in its interior in communication with the inlet-opening and the steam ports and passages in said cylinder, substantially as shown and described.

2. In a Huid-motor cn gine, the combination, with the cylinder A, having the inlet-opening b, steam-passages 0, exhaust-portsf,live-steam ports e' e" and m m', and the hollow piston B in said cylinder, in communication with Said inlet-opening and steam ports and passages, of a second cylinder mounted upon the cylinder A and in communication with the live steam ports of said cylinder, and having exhaust-ports f and f and an exhaustpipe g in communication With the exhaust-ports of said cylinder, and a piston-slide h, fitted in said second cylinder, formed with the annular portions 7L and h, and carrying the buffer-pistons d and cl at its ends, substantially as shown and described, for the purpose specied.

In testimony whereof we have signed our names to this specification in the presence ot' two subscribing witnesses.

JOHANN CARL GRABNER. HENRI RUPERTI. Witnesses:

FRITZ MOLLENHOFF, HERMANN KUHFERS. 

